Mounting for the crystal of a wrist watch casing



Feb. 4, 1936. J. GOLDBLATT 2,029,769

MOUNTING FOR THE CRYSTAL OF A WRIST WATCH CASING Filed Dec. 4, 1954 INVENTOR n6 ATTORNEY- Patented Feb. 4, 1936 UNITED STATES PATENT OFFICE MOUNTING FOR THE CRYSTAL OF A WRIST WATCH CASING 3 Claims.

My invention relates to improvements in a mounting for the crystal of a wrist watch casing.

The object of the present invention is to construct the walls of the dial opening in a watch 5 casing of this type with a beveled surface against which the peripheral edge of a beveled crystal is adapted to seat and which is provided with spaced upright lugs or gem mountings capable of being worked over the edge of the crystal for the purpose of gripping the latter and holding it firmly seated against the beveled surface of the dial opening.

I accomplish this object by means of the construction described in the following specification, set forth in the appended claims and illustratively exemplified in the accompanying drawing, in which, Figure 1 is a plan view of a wrist watch casing showing the mounting for the crystal; Figure 2 is a substantially transverse sectional view taken on lines 22 of Figure 1; and Figure 3 is a perspective view of the watch casing before the crystal is mounted and after the notches have been worked into the material, the dotted line showing the locus of the periphery of the crystal when mounted therein.

Referring to the drawing, l0 denotes the casing of a wrist watch and II the crystal which is provided with a beveled edge l2. The crystal II is seated in the opening in the casing adapted to receive the dial I3, the wall M of the opening being tapered inwardly towards the center and at four diametrically disposed points in the opening the material of the casing is built up to form lugs or gem mountings l5. The inner sides of the mountings l5 are notched to form seats l6 upon which the under peripheral edge of the crystal is supported and when the latter has been placed in the opening with beveled surface turned upwardly its edge contacts with the tapered wall M to form a seal and at four points rests upon the seats formed by the notches I6. The artisan mounting the crystal then turns down the metal of each mounting I5 above the notch onto the beveled edge of the crystal H until the latter is firmly gripped and held in its proper position in the dial opening.

According to the present invention the necessity of a separate bezel to carry a watch case crystal is entirely eliminated and as shown in the illustrations the casing may be studded with gems right up to the edge of the crystal and because no bezel is required the crystal itself may be made to appear as the large center gem.

What I claim and desire to secure by Letters Patent is:

1. A watch casing having a dial opening with an inwardly tapered wall and spaced seats arranged in the tapered wall, and a crystal peripherally contacting the tapered wall and being supg ported on the seats, the material of the wall above the seats being turned over on the crystal to grip the latter and hold it in contact with the wall of the opening.

2. A watch casing having an inwardly tapered 5 dial opening and diametrically disposed lugs projecting upwardly from the tapered wall of the opening and provided with notches to form seats, and a crystal mounted in the opening with its peripheral edge contacting the tapered wall and 30 spaced points being supported in the notches, the material of each lug over the notch being worked over the edge of the crystal to hold the latter firmly in contact with the wall of the opening.

3. A watch casing as claimed in claim 2, in 35 which the crystal is beveled at its edge to receive the turned over portion of the lug.

JOSEPH GOLDBLA'I'T. I 

